| 多年冻土地区工程桩桩侧冻结力数值分析 |
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| 引用本文： | 徐春华,徐学燕,邱明国,慕万奎. 多年冻土地区工程桩桩侧冻结力数值分析[J]. 哈尔滨工业大学学报, 2007, 39(4): 542-545 |
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| 作者姓名： | 徐春华 徐学燕 邱明国 慕万奎 |
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| 作者单位： | 哈尔滨工业大学,土木工程学院,哈尔滨,150090;黑龙江省交通科学研究院,哈尔滨,150080 |
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| 基金项目： | 国家自然科学基金资助项目(40571032);;西部交通建设科技资助项目(200231877406) |
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| 摘 要： | 依据侧向冻结力试验无厚度的非线性接触面单元模拟桩土界面,采用双曲线非线性模型冻土本构关系编制三维非线性有限元程序.数值分析得P-s曲线与现场静载试验P-s曲线吻合程度良好,结果表明:桩周冻土温度、桩径、桩长强烈影响着桩侧冻结力的分布状态,得到桩侧冻结力的分布影响规律;增大桩径是提高工程桩承载力、减小沉降量的有效措施;增大设计桩长对提高工程桩承载力贡献较小.
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| 关 键 词： | 多年冻土 冻结强度 桩侧冻结力分布 三维非线性有限元 |
| 文章编号： | 0367-6234(2007)04-0542-04 |
| 修稿时间： | 2005-07-14 |
Numerical analysis of adfreezing force of engineering pile in permafrost |
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| XU Chun-hua,XU Xue-yan,QIU Ming-guo,MU Wan-kui. Numerical analysis of adfreezing force of engineering pile in permafrost[J]. Journal of Harbin Institute of Technology, 2007, 39(4): 542-545 |
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| Authors: | XU Chun-hua XU Xue-yan QIU Ming-guo MU Wan-kui |
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| Affiliation: | 1.School of Civil Engineering;Harbin Institute of Technology;Harbin 150090;China;2.Heilongjiang Transportation Research Institute;Harbin 150080;China |
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| Abstract: | Based on adfreezing force with frozen soil and concrete test data,contact elements of zero thickness imitating interface of pile and permafrost are inducted,and bi-linear constitutive relations are introduced as nonlinear constitutive relations of soil elements and interface elements in order to consider permanent displacement.A 3-D nonlinear FEM program is also developed.The calculated load-settlement curve and that obtained from in-situ test are in well agreement,which verifies the model.The distribution ... |
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| Keywords: | permafrost freezing strength adfreezing force distribution 3-D nonlinear FEM |
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